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US 8,509,455 B2Granted
Multiple-use acoustic port
AssigneeApple Inc.
InventorsJustin Gregg, Michael M. Lee, Chad Seguin
Life of this patent
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AssigneeApple Inc.
InventorsJustin Gregg, Michael M. Lee, Chad Seguin
Estimating the term…
Two or more acoustic transducers share the same acoustic port in a device. The acoustic properties—such as acoustic impedance and frequency response—of the shared acoustic port are matched to each of the two or more acoustic transducers. To accomplish acoustic impedance matching, a separate back volume is provided for each of the acoustic transducers, matched to that transducer. Frequency response matching can be accomplished by the design of the transducer itself, but also by providing an adjacent element in the acoustic system of the transducer. One transducer may serve as an element in the acoustic system of another transducer. Frequency response adjustment of an individual element may also affect acoustic impedance of the entire port-transducer system.
An audio device comprising:
A method of tuning an acoustic property of an audio device having a housing defining an internal volume, the housing including a first transducer having a first acoustic property and a second transducer having a second acoustic property, the first transducer and the second transducer positioned within the internal volume so as to segregate the internal volume into a common front volume, a first back volume defined in part by the first transducer, and a second back volume defined in part by the second transducer, and the housing including an acoustic port extending through the housing and connecting to the common front volume, the acoustic port having an acoustic property, the method comprising:
A sound generating system comprising:
Dependencies are inferred from the claim text.